/* match.c - simple shell-style filename matcher
**
** Only does ? * and **, and multiple patterns separated by |.  Returns 1 or 0.
**
** Copyright ? 1995,2000 by Jef Poskanzer <jef@mail.acme.com>.
** All rights reserved.
**
** Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions
** are met:
** 1. Redistributions of source code must retain the above copyright
**    notice, this list of conditions and the following disclaimer.
** 2. Redistributions in binary form must reproduce the above copyright
**    notice, this list of conditions and the following disclaimer in the
**    documentation and/or other materials provided with the distribution.
**
** THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
** ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
** IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
** ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
** FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
** DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
** OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
** HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
** LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
** OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
** SUCH DAMAGE.
*/



#include <string.h>

#define DBG_SUBSYS S_YWEB

#include "sysutil.h"
#include "match.h"
#include "dbg.h"

static int match_one(const char *pattern, int patternlen, const char *string)
{
        const char *p;

        for (p = pattern; p - pattern < patternlen; ++p, ++string) {
                if (*p == '?' && *string != '\0')
                        continue;

                if (*p == '*') {
                        int i, pl;
                        ++p;
                        if (*p == '*') {
                                /* double-wildcard matches anything */
                                ++p;
                                i = _strlen(string);
                        } else {
                                /* single-wildcard matches anything but slash */
                                i = strcspn(string, "/");
                        }

                        pl = patternlen - (p - pattern);

                        for (; i >= 0; --i) {
                                if (match_one(p, pl, &(string[i])))
                                        return 1;
                        }

                        return 0;
                }

                if ( *p != *string )
                        return 0;
        }

        if ( *string == '\0' )
                return 1;

        return 0;
}

int match(const char *pattern, const char *string)
{
        const char *or;

        while (srv_running) {
                or = strchr(pattern, '|');
                if (or == NULL)
                        return match_one(pattern, _strlen(pattern), string);

                if (match_one(pattern, or - pattern, string))
	                return 1;

                pattern = or + 1;
        }

        return 0;
}
